I have tried filing a chamfer on the male end of several pieces - no luck.
I have use a deburring tool on the female bell ends - no luck.
As an experiment, I took a piece of smaller conduit (1 1/4 inch)
and cut off the bell end and tried It on the male end of the same
piece - even worse. It would not even start into the bell. At least
the 2 inch ones will start in a small fraction of an inch before seizing.
The conduit is several hundred feet from an electricity, so a heat gun
is not in the cards as Bill suggested.
Terry
________________________________________
From: Grant Saviers <grants2@pacbell.net>
Sent: Friday, November 3, 2017 6:25 PM
To: Zivney, Terry
Subject: Re: [TowerTalk] Conduit in trench
In my experience, it is important for the two sections to be straight
for larger diameter - co-linear. Also very clean. There might be a
burr on the male end, a knife as a scraper can make a bevel. I add a
section at a time, shovel handles laid across the trench as supports so
I'm not working in the dirt. The mate is about 1/2 the diameter so if
you get 2" in 1" that is ok. Be sure to hold the joint tight for a
minute so the female taper doesn't push out the male.
Your concern about couplings in well placed. In a community water
system with 1000' of 2" pressurized distribution, couplings and elbows
were the failure points, elbows especially since they can get a lot of
stress. We always replaced sch40 fittings that failed with sch80. (the
od of all wall thickness pipe is the same in a given size). Maybe
twice the cost but reliably fixed. For conduit use there isn't the
stress as in a water system and I think sch40 will work fine.
I've put in lots of conduit (almost all from HD) and not had a mating
problem other than dropped or stepped on sections.
Grant KZ1W
On 11/3/2017 15:02 PM, Zivney, Terry wrote:
> I am trying to join sections of 2 inch (nominal) PVC conduit for burial in a
> trench.
> This is schedule 40 electrical conduit, not water or drain pipe.
>
>
>
> I cannot get the sections to mate. The belled portion of the conduit
> is too snug on the main body. Even with the proper primer and
> cement, it is so snug that I cannot manhandle two pieces together,
> much less dozens!
>
>
>
> I found that the sweeps I bought would go on with some difficulty.
> The short couplers, about 3 inches long will fit, but give very little
> overlap, only about an inch if fully seated.
>
>
>
> I notice that the electrical drops down the power poles around
> here have the same PVC conduit, but instead of using the
> built-in bell ends, the crews apparently just use the short couplers
> on the straight end ( I guess they cut off the bells?).
>
>
>
> I am worried that the short couplers may not provide adequate
> strength when the conduit is stressed to drop in into the trench.
>
>
>
> Any experience?
>
>
>
> Terry N4TZ
> _______________________________________________
>
>
>
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